A horizontal fan coil unit is a type of air conditioning system that uses a fan to circulate air throughout a space. It is a popular choice for many commercial and residential applications due to its cost-effectiveness and energy efficiency. The fan coil unit consists of a fan, a coil, and a filter. The fan is used to move air through the coil, which is typically made of copper or aluminum. The coil is then heated or cooled by a refrigerant or water, depending on the type of system. The filter is used to remove dust and other airborne particles from the air. The air is then distributed throughout the space via ducts or vents. Horizontal fan<fan coil units are a great choice for those looking for an efficient and cost-effective way to cool or heat their space. They are also easy to install and maintain, making them a popular choice for many homeowners and businesses.